37.66.148.189
# IP Intelligence Briefing: 37.66.148.189
## Executive Summary
IP address 37.66.148.189 is classified as Low Risk with a risk score of 0. The IP belongs to SFR (Societe Francaise du Radiotelephone), a major French telecommunications provider, and exhibits characteristics of mobile carrier infrastructure. No threat indicators, blacklisting, or malicious activity have been observed.
## Profile Overview
- ASN: 15557 (SFR Legal Contact)
- Organization: SFR-INFRA
- CIDR Block: 37.66.144.0/21
- RIR: RIPE (Europe)
- Geolocation: France, Hauts-de-France region, Wattrelos
- Network Classification: Mobile Carrier (LTE/5G), Firewalled/No Services
- Mobile Carrier: SFR (MCC: 208, MNC: 10)
## Threat Assessment
- Risk Score: 0 (Low Risk)
- Abuse Confidence Score: Not applicable
- Blacklist Count: 0
- Tor Exit Node: No
- Known Attacker: No
- Spam Source: No
- Known Campaigns: None identified
- Threat Observation Count: 0
Key Indicators: The IP has no open services, no TLS certificates, and no active HTTP endpoints. DNS resolution confirms the address resolves to 189.148.66.37.rev.sfr.net with reverse DNS validation. SPF records are present; DMARC is not configured.
## Observation History
- Total Observations: 18 signals recorded
- Ownership Changes: 0
- Threat Persistence Days: 0
- Is Persistently Malicious: No
- Recent Activity: Consistent ownership attribution to SFR Legal Contact; no escalation in threat indicators.
## Network Relationships
- DNS Associations: 189.148.66.37.rev.sfr.net (repeated association)
- Network: SFR-INFRA
- Organizational Links: Limited to network-level associations
- Certificate Matches: None
## Neighborhood Analysis (37.66.148.0/24)
- Abuse Density: 0 (Clean)
- Total Siblings: 2
- Active Siblings: 1
- Threat Siblings: 0
- Notable Neighbor: 37.66.148.53 (Risk Score: 0, Authority Score: 60)
- Subnet Classification: Clean
## Recommended Actions
No immediate firewall or blocking actions recommended. The IP exhibits normal mobile carrier endpoint behavior with no malicious signals.
## SOC Analyst Notes
This IP is a legitimate mobile carrier endpoint from SFR France. Traffic from this address should be evaluated in context of mobile network usage patterns. No blocking or alerting is warranted based on current intelligence. The subnet shows no abuse density, and the single active sibling IP also presents low risk. Monitor for any changes in behavior, but treat as benign infrastructure traffic.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | SFR Legal Contact |
| ASN | AS15557 |
| Network Name | SFR-INFRA |
| CIDR Block | 37.66.144.0/21 |
| RIR | RIPE |
| Country | FR |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 189.148.66.37.rev.sfr.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | 189.148.66.37.rev.sfr.net |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | Present |
| DMARC | Not configured |
| FCrDNS | Verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Mobile |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS15557 |
| Network Prefix | 37.64.0.0/13 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 0% | 0 | 0 |
| routing | 0% | 0 | 0 |
| services | 0% | 0 | 0 |
| ownership | 0% | 0 | 0 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 4% | 1 | 1 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-12 02:47:26 UTC |
| Last Seen | 2026-07-26 23:48:58 UTC |
| Profile Built | 2026-08-31 01:09:40 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 22 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 37.66.148.189
Who owns the IP address 37.66.148.189?
37.66.148.189 is registered to SFR Legal Contact. The address falls within the 37.66.144.0/21 network block. Registration is held at RIPE.
Where is 37.66.148.189 located?
Geolocation data places 37.66.148.189 in Wattrelos, Hauts-de-France, France. The local time zone is Europe/Paris. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 37.66.148.189 malicious or safe?
37.66.148.189 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 37.66.148.189?
The reverse DNS (PTR) record for 37.66.148.189 is 189.148.66.37.rev.sfr.net. This hostname is forward-confirmed, meaning it resolves back to the same address.
Is 37.66.148.189 a VPN, proxy, or data center address?
37.66.148.189 is classified as a mobile network based on network ownership and behavioural analysis.